My limited knowledge suggests that these might be worth looking at...
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F273108581338
This looks like a very original unmolested pair of Lowther Bicor speakers which given someone with the talent and knowledge I am sure could be put back to pristine condition . Just that person is certainly not me ...
Wonderful condition and wonderful sound to match.
Have a look here at more details
http://theartofsound.net/forum/showthread.php?45183-FOR-SALE-Hornet-Hedlund-horns-with-Lowther-DX4-drivers